Corn amd cob mill



R. D. GRANGER.

, Corn and Cob Mill.

Patented Sept. 18, 1855.

unrrnn sTaTns PATENT oTTion.

R. D. GRANGER, OF PHILADELPHIA, PENNSYLVANIA.

CORN AND COB MILL.

Specification of Letters Patent No. 13,569, dated September 18, 1855.

[0 all whom, it may concern:

Be it known that I, RENSSELAER D. GRANGER, of the city of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Corn and Cob Mills; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing and to the letters of reference marked thereon.

My invention consists, firstly, in connecting the outside shell with the bur (the latter being stationary and the former movable) in such a manner that the outside shell. in its attempts to rise above the bur may be'more or less confined to the same by a spring of any yielding substance, while at the same time the teeth of the shell and those of the bur are prevented from coming in too close cont-act with each other the teeth of the shell being maintained at a uniform distance fro-m those of the bur by horizontal adjustable guide rollers as hereinafter more fully described.

In order to enable others skilled'in the art to make and use my invention I will now proceed to describe its construction and operation.-

On reference to the drawings Figure 1"is a sectional elevation of a corn and cob-mill with my improvements; Fig. 2, an enlarged detached view showing more distinctlythe method of connecting the shell to the bur; Fig. 3, a detached sectional View of the ring which composes a portion of the supports. I A is the outside shell of the mill; B, the bur having a shaft G into the top of which is cast or otherwise secured the screwed spindle D. The shell A is in two pieces jointed together by the flanges E, on one of which are cast the pieces m, which serve as attachments for the driving apparatus. To the inside of the inclined portion a. of the shell which forms the hopper of the mill are cast the toothed arms F which may be of any convenient number, and higher up in the hopper are screwed another set of toothed arms G which form the bridge tree, the shaft C of the bur passing freely through the hubs of both sets of arms F and G which are allowed to revolve with the outside shell. ()n the top of the arms G is cast the arched piece e through the top hub f of which passes freely the screwed spindle D. The hole in the hub f has a countersink above and below for the reception of the cone shaped washers b and Z). Underneath the lower washer b is the nut 0 and above the washer b is the spiral spring (Z, which is confined to its place and caused to bind with more or less pressure on the washer by the upper nut g. Between the arms F and Gr are another set of toothed arms H which'being secured to the shaft C of the bur remain stationary therewith. On the bottom of the outside shell is cast the strip h the outside of which is parallel with the axis of the mill. Against this strip bear the peripheries of the horizontal rollers i which revolve upon pins y. The latter are secured to the horizontal port-ion of the legs'K by nuts 70 in such a manner that the pins with their rollers may be set up toward the strip 70 of the outside shell. This is easily accom-. plished as' the lower part of the pins j pass through oblong holes in the legs K. These legs are constructed and secured to the stationary bur in a peculiar manner. A metal ring Z the section of which is seen in Fig. 3 is made so as to fit compactly the inside of the bur and actually wedges itself tight therein. The legs K are cast or otherwise secured to the ring, the whole forming a secure and substantial support.

It will be perceived that the upper portion of the outside shell is contracted into a narrow neck for the purpose of rounding the top of the bur m and thereby obtaining a more eflicient surface of grinding teeth. The preparatory breaking teeth are also'increased in number and efiiciency by the introduction of the stationary toothed arms H.

The outside shell is always maintained in its proper position in respect to the bur, at the top by the coneshaped washers and screwed spindle D as well as by the shaft C of the bur, and at the bottom by the adjust-able rollers.

The nut 0 can be regulated so as to allow the outsideshell to be brought down nearer to or up farther from the bur, and the tendency of the shell to rise above the bur is prevented by the spiral spring (Z the elasticity of which is rendered more or less rigid by the nut g. In case of any extremely hard substance being introduced between the teeth of the mill the spiral spring will yield and relieving the shell thus prevent accidents.

The method of constructing the supports has been already sufiiciently described to show that they are of themselves self attaching a simple screw being amply suffi- 5 cient to render them a permanent portion of the bur.

Wish it to be understood that I do not t-ire to confine myself to any particular hiumber of arms on the bridge tree G or 10 pieces F and H as that must be determined by the size of the mill, neither do I Wish to claim any particular size or arrangement of breaking or grinding teeth, but

desire to secure by 

